About 6 months ago my A4 began to be hard to start when cold. It cranks for about 5 seconds then starts. When the engine is warm, it starts fine. I read somewhere that the problem could be a pressure leak in a "fuel cold start valve" or a pressure leak somewhere.
Does anyone have any advice I can take to my Audi dealership. They have said that there is no problem or that they can not find the problem.

 

Have you had it scanned for codes? It might be the Coolant Temperature Sensor and when mine failed, it threw a code.

 

What engine do you have? I had the same problem a little while ago until I got my boost leaks repaired. Now it's starts perfectly fine.

 

I would start by replacing the coolant temp sensor. Mine has different temp start issues and it turned out to be the coolant temp sensor. It's only a $7 part from napa.

 

Had same problem as well, tried scanning for codes = no codes, tried taking to audi dealer = no issues.
Not sure if this might work for you but it did for me, I changed my MAF and no issues since.

 

Hi Prokon, were you able to resolve your problem? Mine is 99 A6 2.8, same problem. I believe the problem relating the ECT has different sympton. The ECT is hard to start when warm instead of cold. I changed mine anyways, but there is no improvement. Would appreciate if you can feed me your findings.

 

seafoam it

 

Thanks for the reply but what does it mean?

 

seafoam is a engine treatment that cleans out carbo deposits in youre injectors and pistons, and when you pour it into youre crank case( the palce where you put youre oil in) it cleans stick lifters and rods

i have amazing cold starts since i did my seafoam

 

What about those so called injector cleaners?